要点
- CVE-2026-27937 は october/system に影響する深刻度「低」 (CVSS 3.1) の脆弱性です。
- 今後30日間に悪用される確率（EPSS）：0.14%（全脆弱性の 3.7% より高い）。
- 対処：3.7.16 以降に更新してください。
概要
A reflected Cross-Site Scripting (XSS) vulnerability was identified in the backend DataTable widget where a query parameter was rendered without proper output escaping.
Impact
- Reflected XSS only, no stored/persistent component
- The backend URL prefix is customizable and must be known or guessed by the attacker
- Requires an authenticated backend user to visit a crafted URL
- No direct access is gained without social engineering
Patches
The vulnerability has been patched in v3.7.16 and v4.1.16. The affected parameter is now properly escaped. All users are encouraged to upgrade to the latest patched version.
Workarounds
- Use a non-default backend URL prefix (recommended as standard practice)
- Implement a Content Security Policy (CSP) for backend pages
NVD の説明
October is a Content Management System (CMS) and web platform. Prior to 3.7.16 and 4.1.16, a reflected Cross-Site Scripting (XSS) vulnerability was identified in the backend DataTable widget where a query parameter was rendered without proper output escaping. This vulnerability is fixed in 3.7.16 and 4.1.16.
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